Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9RFH callsign genealogy
Currently held by HELBING, ROBERT F
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KC9RFH's current licensee, walking backwards.
- HELBING, ROBERT FINgranted 2004-11-10cancelled 2004-12-17
Successor callsigns
Callsigns held now by people who previously held KC9RFH.
No current licensee on record previously held this callsign.